zimmer



(No Model.) 2 Sheets-Sheet 1.

F. W. 'ZIMMER.

STENGIL COPYING APPARATUS.

N0. 390,430. Patented Oct. 2, 1888.

(No Model.) 2 Sheets-Sheet 2 F. W. Z-IMMER. STENCIL COPYING APPARATUS.

No. 390,430. I Patented 0015.2, 1888.

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armer tries.

OF NEY YORK, N. Y.

STENCIL-COPYING APPARATUS.

EEPECIFICATION forming part of Letters Patent No. 390,430, dated October 2, 1888.

Application filed May 2, 1887. Serial No. 136,851. (No model.) Patented in England June 2, 1987, No. 7.99;).

To all uhom, it may concern- Be it known that I, FREDERICK W. ZIMMER, a subject of the Emperor of Germany, resid ing at New York, in the county of New York and State of New York, have invented new and useful Improvements in Stencil-Copying Apparatus, (which was patented in England June 2, 1887, numbered 7,995,) of which the following is a specification.

My improvements relate to that class of steueil-copying apparatus in which a stencil sheet is produced by the writing of a stylus upon a transparent waxed or oiled paper contained in a frame which is superposed upon a metallic file-surface, the copy being afterward obtained by passing an inking-roller overaud upon the stencil, the paper to receive the copy being placed beneath it.

My improvement consists, in the first place, in giving to the clamping-frame for the stenoil-paper such a construction that it e'anhold securely paper of various grades of thickness and elasticity without cutting or tearing the paper where it is bound by the frame.

My improvement consists, also, in securing the stencil-holding frame to a spring-hinge fastened to the bed-frame in such manner that the stencil-holding frame can be easily re moved from the hinge to allow the sheet to be properly placed upon the file to receive the writing to form the stencil.

The operation of the spring-hinge is to remove the stencil automatieally,and thus allow of the free use of the hands to remove the copy and replace it by a fresh sheet, and its provision for separating thestencilcarrying frame from the base-panel gives an important advantage, of which I shall hereinafter speak.

In connection with the spring-hinge for autoin aticall y raising the stencil-carrying frame, as stated, I provide the bed-frame with a start ing-spring arranged to act upon the free end of said frame as a means for starting its opening movement.

In the accompanying drawings, Figurcl rep resents a view in perspective of my improved apparatus for stencil-printing, showing the steneil-earrying frame in raised position after printing upon the sheet placed upon the bedpanel. Fig. 2 is a cross-section of the appa ratus, showing the stencil in position for printing upon the sheet placed upon the bed-panel. Fig. 3 is a longitudinal section of the same. Fig. 4 shows in sectional detail view the manner of connecting the stencil-carrying frame with the movable leaf ofthe spring-hinge after the stencil-sheet has been written upon on the file'surface and for securing the frame for printing. Fig. 5showsin edge view the socket part of the stencilearrying frame, which receives the upper or movable leaf of the hinge. Fig. 6 shows in perspective the upper part of the stencil-clamping frame. Fig. 7 shows the stencil clamping frame in vertical longitudinal section placed upon atable,wit'h the sheet in position upon the file to receive the writing by the stylus when said frame is separated from its actuating spring-hinge. Fig. Sshows the spring-hinge, and Fig. 9 is a section of the base-frame and its block on which the paper is placed to receive the printing.

A is the base of the eopying press, preferably a box, in which the materials for use in the process are stored.

B is the bed-panel, upon which the paper to receix e the copy is laid.

C, Fig. 1, is the frame in which the waxed or oiled paper I) is fastened. The stencilclamping frame 0 is constructed of two parts a frame, F, and the reversible top frame, E, fitting into F by means of the recess or groove f therein, and the moldings e c in frame E and fastened together.

G is a spring hinge fastened by one leaf to v the base A of the press, its other leaf, 9, fitting into sockets H, Fig. 5, in the bottom of frame F. A part. g, of the upper or movable leaf, g, is upset, and has an aperture, 71, Fig. 9, through which projects a screw-pin, 5, Fig. 4, projecting from the outer edge of the frame F when the hinge-leaf is inserted into the socket H to connect the stencil-frame with the baseframe.

lhe object of this spring G is to raise the frame to a certain height the moment it is relieved of the pressure of the hand, to allow the operator to remove the copy with one hand and with the other place another sheet on the stencil, and thus facilitate the copying. A milled-head nut, I, is screwed onto the screwpin 2', and thus fastens the frame F securely to the hinge.

ICO

The sockets are shown as being formed by a recessed plate, H, secured to the frame F to receive the parts is of the hinge, or the socket may be formed in the frame F in any suitable way, so as to receive the movable leaf of the hinge for a detachable fastening.

The apparatus is used as follows: The frame being removed from the hinge of the base A,

its two parts E and F are separated and the stencil-paper introduced between them. The two frames are then clamped together by means of the hooks shown in Fig. 1. If the stencilpaper is thin and elastic, the frame E is fitted with its moldings e entering into the recesses f in frame F, as in Fig. 2; but if the paper is stiff and liable to tear, the rounded molding c is used, as shown in Fig. 3.

The object of having the double clampingframe for the stencil detachable from the hinge fixed to the base-frame is to permit the stencil-carrying frame to be separated from the base part of the apparatus, to allow it to be placed in horizontal position upon the file L, which is placed upon a table, as in Fig. 8, so that the stencil can be properly prepared by writing upon it with the stylus, M being the hand-rest, used when writing on the stencil. NVere it not for this separable provision, it is evident that the frame carrying the sheet to form the stencil could not be brought in a perfeet surface-plane upon the fileif the latter was placed upon the block B, so that it would be impossible to properly write with the stylus upon the sheet. The stencil-sheet having been thus prepared, as shown in Fig. 8, by writing upon it, during which process it is moved over the file, together with the hand-rest M, until the necessary writing has been made, its carrying-frame is then fixed to the upper or movable leaf of the spring-hinge, so that the stencilsheet will work in perfect plane with the surface of the copy-receiving sheet placed upon the block.

The fastening of the frame F to the hinge is by thrusting the leaf 9 into the socket H and screwing the milled nut onto the end of pin i, which projects through the aperture in the upset portion 9.

Should it be desired to substitute another stencil, it can be very quickly done by unscrewing the nut I, removing the frame (I, and proceeding with the frame and new sheet for the stencil in the manner already described.

In the drawings I have shown a socket-joint of a particular description by which the stencil-frame and hinge are fastened together; but I do not limit myself to ,a socket and detachable fastening of such construction.

During the copying the stencil-frame is held down by one hand, while with the other hand the operator is using the roller, and as a means for starting the frame quickly after the operation I provide a starting-spring, c, fastened to the base-frame so as to be compressed by the depression of the stencil-frame and to act upon its free end when released from pressure, and thus assist the action of the spring-hinge to quickly raise said frame for the removal of the printed sheet and the placing of another for a repetition of the operation.

I clairn 1. In a stencilcopying apparatus, the stem oil-holding frame F, having a socket, in combination with the bed-panel frame having a hinge, the movable leaf whereof is adapted to enter said socket, and is provided with a flange or arm and a clamp whereby said stencil-holding frame is removably secured to said movable hinge-leaf, substantially as described.

2. The combination, with the frame F, having the groove f, of the reversible clamping frame E, having moldings on its opposite sides of different forms, the molding 6 being rounded and of less projection than the moldingcfor the purpose of clamping paper of different thickness into the said groove, as herein set forth.

3. The combination of base A and the stencil-carrying frame having a socket with a hinge, G, and means for detachably securing it within the socket of the stencil-carrying frame. substantially as described.

4. The combination of base A, hinge G, having flange g, with upset leaf g and aperture 76, the removable frame having a socket, screwpin 1', and nut I, substantially as described.

5. The combination of the base-frame and the stencil-carrying frame with the springhinge G and a starting-spring, 0, as and for the purpose described.

6. In a stencil-copying apparatus, the stencil-holding frame havinga plateforming socket, II, in combination with a hinge having the pintle-spring G, and the movable leaf having the arms k k and right-angled flange h, and a clamp securing said stencil-frame to the hinge flange, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

FREDERICK W. ZIMMER.

\Vitnesses:

H. RIED, F. SCHMIDT. 

